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CHROMATE CONVERSION PROCESS |
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Chromate conversion is a chemical treatment process for aluminum that provides protection from corrosion and enhances the ability of paint and/or adhesives to "bond" with the aluminum. During this multi-stage process, the surface of the aluminum reacts with the coating treatments and becomes a part of the coating. The coating consists of a thin film on the surface which is soft when freshly formed, and then becomes more abrasive-resistant as it is dried and aged. The Benefits of Chromate: - Increased Corrosion-Resistance - Excellent Bonding Surface for Paint & Adhesives - Prolongs life of finish - Prolongs life of fixture Be advised that not every lighting fixture
manufacturer supplies their die cast aluminum parts with chromate conversion,
and those that do often do not use a thorough nine-stage process. This
process combined with top-grade aluminum ensures a long-lasting, durable product. |
| PROCESS | PRE-CLEAN |
ALKALINE CLEANING |
AFTER ALKALINE CLEANING RINSE |
AFTER ALKALINE CLEANING RINSE |
DEOXIDIZER |
AFTER DEOXIDIZER RINSE |
CHROMATE CHEMICAL CONVERSION COATING |
AFTER CHROMATE CHEMICAL RINSE |
FINAL ACIDULATED RINSE |
DRYING |
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CHEMICAL USED |
P3-ALMECP18 | P3-ALMEC057 | / | / |
DEOXIDIZER 395H |
/ |
ALODINEC 6100 |
/ | / | / |
| 9 BATHS | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | / |
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% FOR CHEMICAL USED PER WATER |
2-4% | 2-4% | / | / | 1-3% | / | 0.8-1.1% | / | / | / |
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TEMP. REQUIRED |
50-65°C | 40-50°C | NORMAL | NORMAL | 20°C | NORMAL | 20-35°C | NORMAL | NORMAL | 60-90°C |
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MINUTES NEEDED |
3-5 | 5-10 | 15-20 | 10-15 | 1-3 | 15-20 | 2-5 | 15-20 | 10-15 | 25-30 |